Muffler.



Patented Dec. V3Q,

C. E. CHBISTMAN.

M U F F L E R.

(Application tiled Aug 8, 1902.1

(No Modem 514124244150@ rSZ'. @"M JM( Stimme/17j .k Fl

WMM/Leones f/ZWM/ ma Teams Penas co, wowumo., wAsmNnroN. n. c.

IlNiTnn .STaTns FaTnivT Ormea,

CHARLES E. CIIRISTMAN, OF SAN JOSE, CALIFORNIA, ASSIGNOR TO CHRISTMANMOTOR CARRIAGE CO., OF SAN JOSE, CALIFORNIA, A CORPORATION OF I/VESTVIRGINIA.

Wl UFFLER.

SPEOIFCATION forming part of Letters Patent No. 717,078, dated December30, 1902.

Application filed August 8, 1902. Serial No. 118,881. (No model.)

T0 a/ZZ whom t may concern.-

Be it known that I, CHARLES E. CHRIST- MAN, a citizen of the UnitedStates, residing at San Jose, in the county of Santa Clara and State ofCalifornia, have invented certain new and useful Improvements inMufflers; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to the annexeddrawings, making a part of this speciiication,'and to the letters ofreference marked thereon.

The present invention has'for its object to provide a simple andeffective device for the muffling of escaping steam, vapor, or gasdischarged under pressure into the atmosphere whereby the noise thereofis materially lessened, and the invention is designed as an improvementupon my former patent of May 27, 1902, No. 701,151; and it consists in amuffler constructed substantially as shown in the drawings andhereinafter described and claimed.

Figure 1 of the drawings is a longitudinal section of a muiilerembodying` myinvention, the several steam-pipes being shown inelevation; Fig. 2, a transverse section thereof, taken on line 2 2 ofFig. 1 and lookingin the direction of the arrow.

In the accompanying drawings, A B represent the outer and innercylinder, respectively, said cylinders being of any suitable length anddiameter and are connected together by heads a b, the head c, and theclamping-screw d. The head o forms the head of the inner cylinder B,which is independent of the head h, and the head d forms the head to theopposite end of the inner cylinder and also the head to the outercylinder, as shown in Fig. l of the drawings. The head ct is formed withinwardly-extending concentric iianges cf, to which the outer and innercylinders A B are secured, respectively, said head having a centralscrew-threaded opening g for coupling thereto the usual exhaust-pipe.The head h has inwardly-extending circumferential flange 7L forconnecting thereto the outer cylinder A, and the' head c has similarflange r) for connecting thereto the inner cylinder B. The head c iscylinders A B are arranged a plurality of v steam-exhaust pipes C,through which the steam, gas, or vapor is discharged into theatmosphere, said pipes being somewhat shorter than the cylinder, one endof which is connected to the head b, and through this end the steam,vapor, or gas escapes and is dischargedinto the'atmosphere.

The inner cylinder B contains a plurality of conducting-pipes D, one endof which is connected to the cylinder-head c and the opposite ends ofthe pipes receiving the steam, vapor, or gas from the exhaust-pipecoupled to the screw-opening g in the cylinder-head o, as shown in Fig.l of the drawings.

The two cylinders one within the other, in

4connection with the arrangement of conducting-pipesand the arrangementof dischargepipes located, respectively, in the inner cylinder and thespace between the walls of the outer and inner cylinders, provides amuffler in many respects superior both in simplicity and practicabilityto those heretofore in use, each cylinder having and containing itsrespective set of pipes in place of the two sets of pipes beingcontained wholly within the space between the inner and the outercylinder as heretofore.

The exhaust steam, vapor, or gas as it passes through the exhaust-pipeinto the end of the inner cylinder B enters the open ends of theconducting-pipes D and passes out throughthe opposite ends of the pipesinto the space between the inner and the outer cylinders, after whichthe steam, vapor, or gas will enter the open ends of the discharge-pipesO and will pass along said pipesv and pass out through the dischargeends thereof into the atmosphere.

I do not desire to be understood as limiting my invention to the precisedetails of construction, as many changes and modifications therein maybe resorted to without in any manner affecting the essential features ofthe invention, and any such changes as would come Within ordinarymechanical skill and judgment maybe made'in the invention Withoutdeparting from the principle thereof.

Having noW fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

l. A muffler comprisingan outer and an inner cylinder, means forconnecting the eX- haust with the inner cylinder, a plurality ofcondensing-pipes located in the inner cylinder and communicating Withthe exhaust and With the outer cylinder, and a plurality ofdischarge-pipes located in the outer cylinder and communicating with theinner cylinder and With the atmosphere, substantially as and for thepurpose set forth.

